* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    color-scheme: light;
    --font-sans: "Google Sans Flex", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", Arial, sans-serif;
    --primary: #1f1f1f;
    --secondary: #74777c;
    --background: #ffffff;
    --accent: #ff6b2c;
    --on-accent: #ffffff;
    --stroke: rgba(0, 0, 0, 0.08);
    --surface: #f2f2f2;
}

@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
        --primary: #eeeeee;
        --secondary: #c7c7c7;
        --background: #131313;
        --accent: #ffb074;
        --on-accent: #131313;
        --stroke: rgba(255, 255, 255, 0.08);
        --surface: #1f1f1f;
    }
}

body {
    font-family: var(--font-sans);
    background: var(--background);
    color: var(--primary);
    -webkit-font-smoothing: antialiased;
}

/* Hero */

.hero-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 18px;
}

.hero-brand img {
    width: 64px;
    height: 64px;
}

.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 64px 40px;
    gap: 24px;
}

.hero-title {
    font-size: 72px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    max-width: 670px;
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 400;
    color: var(--secondary);
    line-height: 1.5;
    max-width: 780px;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    background: var(--primary);
    color: var(--background);
    font-family: var(--font-sans);
    font-size: 18px;
    font-weight: 600;
    border-radius: 100px;
    text-decoration: none;
    transition: opacity 0.15s ease;
}

.hero-cta:hover {
    opacity: 0.85;
}

/* Demo */

.demo-section {
    display: flex;
    justify-content: center;
    padding: 0 40px;
}

.demo-frame {
    width: 100%;
    max-width: 1140px;
    --frame-pad: min(12px, 1.05vw);
    --frame-inner-radius: min(24px, 2.1vw);
    padding: var(--frame-pad);
    background: var(--surface);
    border-radius: calc(var(--frame-inner-radius) + var(--frame-pad));
}

.demo-screen {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--frame-inner-radius);
}

/* Features */

.section-title {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 48px;
}

.features {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 64px 40px;
}

.features-grid {
    width: 100%;
    max-width: 1140px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px 40px;
    text-align: center;
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.feature svg {
    color: var(--primary);
}

.feature h3 {
    font-size: 18px;
    font-weight: 600;
}

.feature p {
    font-size: 14px;
    color: var(--secondary);
    line-height: 1.5;
    max-width: 280px;
}

/* Footer */

.footer {
    display: flex;
    justify-content: center;
    gap: 24px;
    padding: 64px 40px;
}

.footer a {
    font-size: 14px;
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.15s ease;
}

.footer a:hover {
    color: var(--primary);
}

/* Tablet */

@media (max-width: 768px) {
    .hero {
        padding: 48px 24px;
        gap: 20px;
    }

    .hero-brand img {
        width: 48px;
        height: 48px;
    }

    .hero-title {
        font-size: 48px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .hero-cta {
        font-size: 16px;
        padding: 12px 28px;
    }

    .demo-section {
        padding: 0 24px;
    }

    .section-title {
        font-size: 28px;
        margin-bottom: 36px;
    }

    .features {
        padding: 48px 24px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 32px;
    }

    .footer {
        padding: 48px 24px;
    }
}

/* Mobile */

@media (max-width: 480px) {
    .hero {
        padding: 40px 20px;
        gap: 16px;
    }

    .hero-brand img {
        width: 40px;
        height: 40px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 17px;
    }

    .hero-cta {
        font-size: 15px;
        padding: 12px 24px;
    }

    .demo-section {
        padding: 0 20px;
    }

    .section-title {
        font-size: 24px;
        margin-bottom: 28px;
    }

    .features {
        padding: 40px 20px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .feature svg {
        width: 40px;
        height: 40px;
    }

    .footer {
        padding: 40px 20px;
    }
}